#include “stm32f10x.h”
#define GPIOA_CRL (unsigned int)0x40010800
#define GPIOA_CRH (unsigned int)0x40010804
#define GPIOA_IDR (unsigned int)0x40010808
#define GPIOA_ODR (unsigned int)0x4001080c
#define GPIOA_BSRR (unsigned int)0x40010810
#define GPIOA_BRR (unsigned int)0x40010814
#define RCC_GPIOA (unsigned int)0x40021018
//在通过数据手册给PA5引脚配置参数

int main(void)
{

RCC_GPIOA |= (1<<2);
GPIOA_CRL |= (1<<20);
GPIOA_ODR |= (1<<5);

while(1);
}
void SystemInit()//这里的SystemInit函数是为了让程序不报错
{
}

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